Added working varnish mcollective agent.
working varnish + apache config.

this installs and configure varnish + apache. the
vagrant box is ready to be used by mcollective varnish agent
development.

IMPORTANT: This box expects you have a working proxy on 192.168.2.1:3128.
(I hate my proxy, but for now i have to use it.)
Added php class and php test file on apache puppet module.

This commit added php class to nodes and create a sample
php file that returns the current date.

So we could use that to test varnish purging.